80649646 has 24 divisors (see below), whose sum is σ = 151971120. Its totient is φ = 31421280.

The previous prime is 80649643. The next prime is 80649671. The reversal of 80649646 is 64694608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80649641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22111 + ... + 25498.

It is an arithmetic number, because the mean of its divisors is an integer number (6332130).

Almost surely, 2^80649646 is an apocalyptic number.

80649646 is a deficient number, since it is larger than the sum of its proper divisors (71321474).

80649646 is a wasteful number, since it uses less digits than its factorization.

80649646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47640 (or 47629 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 80649646 is about 8980.5147959346. The cubic root of 80649646 is about 432.0501449279.

The spelling of 80649646 in words is "eighty million, six hundred forty-nine thousand, six hundred forty-six".